Mammoth Mountain RV Park is open year-round and located in Mammoth Lakes, CA. The campground offers RV full-hookups, rustic cabins and tent campsites. Our campground is located at the entrance of town, across from the Mammoth Lakes Welcome Center and Ranger Station on Highway CA-203 (Main St). We look forward to helping you make the most of your visit to Mammoth Lakes and the Eastern Sierra.